§ 78-143. Concrete pavement restoration.

Concrete pavement restoration for street cuts and bores shall be in accordance with sound engineering practices and the following procedures:

(1)

A 4,000 psi (minimum) concrete shall be used for street or alley pavement restoration and a 2,500 psi (minimum) concrete shall be used for sidewalk and curb restoration.

(2)

A saw cut shall be made at least two inches deep into pavement in such a method as to produce a straight, clean edge around the patch to be restored.

(3)

If a street cut is made within two feet of an existing crack or pavement joint, the cut shall be extended past the crack.

(4)

If a street cut is made within three feet of an existing curb, it and the intermediate pavement shall be removed and restored.

(5)

All excavated material, as well as debris left by the contractor, shall be hauled out of the work area and disposed of by the permittee.

(6)

All loose material within the trench is to be removed and the top and inside edge of the cut pavement is to be swept clean.

(7)

All trenches backfilled with soil backfill shall be mechanically tamped. Sand backfill shall not be used beneath any pavement or around any drainage structure. Sand backfill may be used only if specifically approved by the public works department in writing.

(8)

An epoxy bonding agent is to be applied to the inside edge of the cut immediately before pouring concrete. The epoxy resin system to be used must be first approved by the public works department. The epoxy bonding agent may be eliminated by installing steel dowels which will bind the new pavement to the old existing pavement and provide for load transfer. These dowels must be installed in a manner acceptable to the public works department.

(9)

An independent testing laboratory shall be hired by the permittee to design and control the concrete mixture to be used. The laboratory shall make four test cylinders of the concrete mixture and test them at three, five, seven and 28 days for compressive strength. The laboratory shall furnish the city-parish consolidated government with a report certifying the compressive strength test results. This is not required for pours of less than two cubic yards.

(10)

All concrete placement, vibration and form work and curing shall be in accordance with the 1982 edition of the Louisiana Standard Specifications for Roads and Bridges, section 601. The finished texture shall be a broom finish.

(11)

Traffic may not resume on the newly restored pavement until a compressive strength of 3,000 psi is obtained from the laboratory-prepared concrete test cylinders. The permittee shall provide for effective traffic control and maintenance during the concrete curing period.

(12)

If the restoration encompasses a contraction or expansion joint, the permittee shall replace it. The new joint shall match the original design and be of the same quality.

(13)

Minimum patch width shall be four feet wide.

(14)

The existing concrete pavement shall be cut back a minimum of 12 inches past the vertical trench wall, allowing the newly restored pavement to be supported on the existing road base.

(15)

The minimum thickness of restored pavement shall be the thickness of the existing pavement or ten inches, whichever is greater.

(City Code 1965, § 19-19(c))